FAQ

1. What types of carbonization furnace systems does Pyrogreen provide?

Pyrogreen provides six main biomass thermal processing technologies:
- Continuous Biochar Machine
- Autothermal Biochar Production Equipment
- Continuous Biomass Torrefaction Equipment
- Updraft Fixed-Bed Carbonization System (UFBC)
- Downdraft Fixed-Bed Carbonization System (DFBC/B)
- Downdraft Fixed-Bed Carbonization System (DFBC/S)
These systems are designed to accommodate different biomass feedstocks, operating conditions, and end-product requirements. The appropriate technology is selected based on factors such as feedstock characteristics, moisture content, particle size, processing capacity, and desired product properties.

2. Can Pyrogreen systems process multiple types of biomass feedstock simultaneously?

Pyrogreen systems can process a wide range of biomass feedstocks, including rice husk, corn straw, sawdust, and wood chips. For optimal and stable operation, however, we recommend prioritizing feedstocks with high bulk density, high calorific value, and high lignin content, and using one main feedstock as the primary material.

3.What's the feedstock requirements?

Feedstock requirements vary depending on the carbonization system. The recommended specifications are:
- Continuous Biochar Machine: Particle size <50 mm; moisture content <15%
- Autothermal Biochar Production Equipment: Particle size <50 mm; moisture content <15%
- Continuous Biomass Torrefaction Equipment: Particle size <15 mm; moisture content <15%
- Updraft Fixed-Bed Carbonization System (UFBC): Particle size 20–100 mm; moisture content ≤30%
- Downdraft Fixed-Bed Carbonization System (DFBC/B): Diameter 20–80 mm, length 20–80 mm; moisture content <15%
- Downdraft Fixed-Bed Carbonization System (DFBC/S): Particle size ≤10–15 mm; moisture content <15%
Actual feedstock requirements may vary depending on the biomass type and project conditions. For optimal system performance, feedstock should be reasonably consistent in size and moisture content.

4. What is the typical pyrolysis reaction temperature?

The typical pyrolysis reaction temperature is 500–700°C, depending on the feedstock characteristics, system configuration, and desired biochar properties.

5. What heating methods are used in Pyrogreen systems?

Pyrogreen systems use either indirect heating or direct heating, depending on the system configuration:
- Continuous Biochar Machine: Indirect heating, with the heat supplied externally and separated from the biomass being processed.
- Continuous Biomass Torrefaction Equipment: Indirect heating, with external heat supplied to the process.
- Autothermal Biochar Production Equipment: Direct heating, utilizing the combustible gases generated during the carbonization process to provide the required process heat.

6. Can the temperature and residence time in the carbonization furnace be flexibly adjusted?

Yes. The PLC control system allows operators to adjust the carbonization temperature and regulate the residence time by controlling the rotation speed of the furnace.

7. What fuels can be used for heating?

Depending on the system configuration, heating can be provided by diesel, natural gas, heavy fuel oil, or other suitable fuels.

8. Does the carbonization system require a continuous supply of heating fuel?

Not necessarily. Once sufficient combustible syngas is generated during operation, it can be recovered and used as a process fuel, reducing or eliminating the need for continuous external fuel input. External fuel may be required during start-up or under certain operating conditions.

9. What are the main applications of biochar produced by Pyrogreen carbonization systems?

Biochar produced by Pyrogreen systems can be used in various applications, including:
1. Soil Amendment: Improves soil properties, water retention, and nutrient availability.
2. Carbon Removal: Provides stable carbon for long-term carbon sequestration and carbon removal projects.
3. Industrial Applications: Used in fillers, construction materials, and as a renewable alternative to fossil carbon in certain applications.
4. Animal Feed Applications: May be used in feed-related applications subject to applicable standards and regulations.

10. What is the expected biochar yield?

Biochar yield varies depending on the carbonization system and feedstock, and can reach up to 30%.

11. What are the main outputs of the Pyrogreen system?

The main outputs are biochar and heat. The system is designed to minimize tar and condensate formation.

12. How can the waste heat be utilized?

The recovered heat can be used for biomass drying, hot air generation, or waste heat boilers.

13. Does the Pyrogreen system produce environmental emissions?

The system is designed to minimize emissions. Combustible syngas is burned in an adiabatic combustion chamber at high temperature, promoting the breakdown of tar and other combustible pollutants.

14. How does the system minimize tar and condensation?

Syngas is combusted in the adiabatic combustion chamber at temperatures of over 1,000°C, with a designed residence time of approximately 2 seconds. This promotes the complete combustion of tar and helps prevent condensation and tar-related blockages within downstream equipment.